样本均值分布式一个特殊的总体分布。()

未分类题It can be inferred from the first paragraph thatA．the 1957 influenza infected 250,000 people in AmericaB．Asia was the cradle of the 1957 influenza pandemic in America.C．Maurice Hilleman went to Asia to Collect the sample of the influenzaD．it was quite time-consuming to study the genetic structure of the influenza

判断题原始分数和Z分数之间的转换过程实际上就是对分布轴的一种重新标定。()

未分类题The word 'footnote'(Line 1, Paragraph 1)means that the influenza in 1957A．was less important in American medical history.B．imposed little influence on American population.C．was less serious in terms of death toll.D．got less attention of American medical experts.

判断题文法的任意两个符号对之间都存在简单优先关系。()

未分类题Why have venture capitalists found it difficult to invest in wind power?A．Investment in the wind power market is highly risky.B．Development of wind power calls for new technologies.C．Wind power industry did not develop as fast as expected.D．Investment in wind power may not be so cost effective.